/* Scaffolding carried from the Broadsheet landing template — page layout and
   web-scale sizing only; tokens come from the system stylesheet. 28px leading
   unit, 14px half-step; display headers break per sentence. Structure follows
   pigeon.c52.com: dateline → hero + photograph → numbers rail → what it does
   (tool rows) → built for your agent → instead-of → run yourself. */
:root {
  --leading: 28px;
  --half: 14px;
  --edge: clamp(20px, 5vw, 72px);
  --measure: 58ch;
}
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; text-wrap: pretty; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 var(--edge); }
.nav { padding-inline: max(var(--edge), calc((100% - 1200px) / 2 + var(--edge))); }
.nav a { white-space: nowrap; }
.nav a[aria-current='page'] { color: var(--color-accent-700); }
.nav-brand { display: inline-flex; align-items: center; gap: 8px; }
.nav-brand img { height: 20px; width: auto; mix-blend-mode: multiply; }
.nav .author { margin-left: auto; }
/* mobile nav: see follow-author block below */

.kicker {
  display: block; font-size: 13px; line-height: var(--half);
  letter-spacing: 0.08em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 70%, transparent);
  font-feature-settings: "tnum" 1;
  margin: 0 0 calc(var(--leading) - var(--half));
}

/* — head furniture: the dateline rail sits at the top of the page, the way
   pigeon runs its volume line above the headline — */
.masthead { padding-top: calc(1.5 * var(--leading)); }
.rule-head { height: 5px; border: 0; margin: 0;
  border-top: 2px solid var(--color-text);
  border-bottom: 1px solid var(--color-text); }
.rule-cut { height: 0; border: 0; border-top: 1px solid var(--color-text); margin: 0; }
.dateline { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap;
  gap: var(--half) var(--leading); margin: 0; padding: var(--half) 0;
  font-size: 13px; line-height: var(--half); letter-spacing: 0.08em; text-transform: uppercase;
  font-feature-settings: "pnum" 1;
  color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.dateline .trace { display: inline-flex; align-items: center; }
.dateline .trace svg { display: block; }

/* — hero — */
.hero { padding: calc(3 * var(--leading)) 0 calc(2 * var(--leading)); }
.display {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: clamp(42px, 6vw, 80px);
  line-height: clamp(45.5px, 6.5vw, 86.5px);
  letter-spacing: -0.02em; margin: 0;
  margin-left: -0.035em;
  text-box: trim-both cap alphabetic;
}
.display .line { display: block; }
.hero .sub { font-size: 17px; line-height: var(--leading); max-width: var(--measure);
  margin: calc(1.5 * var(--leading) - 1cap) 0 0;
  text-box: trim-both cap alphabetic; }
.hero .row { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--leading); }
.hero-figure { margin: calc(2 * var(--leading)) 0 0; }
.hero-figure.cmyk { overflow: visible; }
.hero-figure .print { aspect-ratio: 986 / 420; }

/* — proof rail — */
.frontpage { padding: calc(1.5 * var(--leading)) 0 calc(2 * var(--leading)); }
.index { display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--half) calc(2.5 * var(--leading));
  padding: calc(var(--leading) - var(--half)) 0 var(--leading); }
.ix { display: flex; align-items: baseline; gap: 8px; margin: 0;
  font-size: 15.5px; line-height: var(--leading); }
.ix-leader { flex: 1; min-width: 28px; align-self: flex-end; margin-bottom: 0.34em;
  border-bottom: 1px dotted color-mix(in srgb, var(--color-text) 45%, transparent); }
.ix-num { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 17px; font-feature-settings: "pnum" 1; }
.ix-num.spot { color: var(--color-accent-700); }

/* — sections — */
.features { padding: calc(3 * var(--leading)) 0 calc(2.5 * var(--leading)); }
.features .lede { font-size: 17px; line-height: var(--leading); max-width: var(--measure);
  margin: calc(var(--leading) - 1cap) 0 0; text-box: trim-both cap alphabetic; }
.cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: calc(1.5 * var(--leading)) clamp(28px, 4vw, 64px);
  margin-top: calc(var(--leading) - var(--half)); }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.col h2, .col h3 { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 24px; line-height: var(--leading); letter-spacing: -0.01em;
  margin: 0; text-box: trim-both cap alphabetic; }
.col p { font-size: 15.5px; line-height: var(--leading); margin: calc(var(--leading) - 1cap) 0 0;
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
  text-align: justify; hyphens: auto; hyphenate-limit-chars: 6 3 3;
  text-box: trim-both cap alphabetic; }

/* — tool rows (pigeon's tool list, set as a ledger: mono name, serif gloss) — */
.tools { margin: calc(1.5 * var(--leading)) 0 0; display: grid;
  grid-template-columns: minmax(180px, 260px) 1fr;
  gap: var(--leading) clamp(24px, 4vw, 56px); }
.tools dt { margin: 0;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 14px; line-height: var(--leading); color: var(--color-accent-700); }
.tools dd { margin: 0; font-size: 15.5px; line-height: var(--leading);
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
  max-width: var(--measure); text-box: trim-both cap alphabetic; }

/* — code — */
.codeblock { padding: calc(2.5 * var(--leading)) 0 calc(2.5 * var(--leading)); }
.codeblock pre { margin: calc(var(--leading) - var(--half)) 0 0; padding: var(--leading);
  max-width: 72ch; overflow-x: auto;
  background: var(--color-neutral-100);
  border-radius: var(--radius-md, 2px);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13.5px; line-height: var(--leading); }
.codeblock .after { font-size: 15.5px; line-height: var(--leading);
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
  margin: calc(var(--leading) - 1cap) 0 0; max-width: var(--measure);
  text-box: trim-both cap alphabetic; }

a { color: var(--color-accent-700); }
a:hover { color: var(--color-accent-800); }
a.btn { white-space: nowrap; }

/* — close — */
.close { padding: calc(2.5 * var(--leading)) 0 calc(2 * var(--leading)); }
.close h3 { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 24px; line-height: var(--leading); margin: 0; text-box: trim-both cap alphabetic; }
.close .sub { font-size: 15.5px; line-height: var(--leading);
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
  margin: calc(var(--leading) - 1cap) 0 0; max-width: var(--measure); text-box: trim-both cap alphabetic; }
.close .row { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--leading); }
footer { padding: calc(2 * var(--leading)) 0; font-size: 13px; line-height: var(--leading);
  color: color-mix(in srgb, var(--color-text) 70%, transparent); }
footer a { color: inherit; }

@media (max-width: 1080px) {
  .cols:not(.cols-2) { grid-template-columns: repeat(2, 1fr); }
  .cols:not(.cols-2) .col:last-child { grid-column: 1 / -1; }
  .cols:not(.cols-2) .col:last-child p { max-width: var(--measure); }
}
@media (max-width: 720px) {
  .hero { padding-top: calc(2 * var(--leading)); }
  .index { grid-template-columns: 1fr; }
  .cols, .cols-2 { grid-template-columns: 1fr; }
  .tools { grid-template-columns: 1fr; gap: 0; }
  .tools dt { margin-top: var(--leading); }
  .tools dt:first-child { margin-top: 0; }
}

/* Review aid: baseline grid — ?baselines or the B key. */
body[data-baselines] { position: relative; }
body[data-baselines]::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    repeating-linear-gradient(to bottom,
      color-mix(in srgb, var(--color-accent) 35%, transparent) 0 1px,
      transparent 1px var(--leading)),
    repeating-linear-gradient(to bottom,
      transparent 0 var(--half),
      color-mix(in srgb, var(--color-accent) 16%, transparent) var(--half) calc(var(--half) + 1px),
      transparent calc(var(--half) + 1px) var(--leading));
}

/* — inner-page furniture — */
.page-head { display: grid; grid-template-columns: minmax(0, 7fr) minmax(200px, 4fr);
  gap: var(--leading) clamp(24px, 5vw, 96px); align-items: center;
  padding: calc(2.5 * var(--leading)) 0 calc(1.5 * var(--leading)); }
.page-title { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: clamp(36px, 4.5vw, 56px); line-height: 1.08; letter-spacing: -0.02em;
  margin: 0; margin-left: -0.035em; text-box: trim-both cap alphabetic; }
.page-head .sub { font-size: 17px; line-height: var(--leading); max-width: var(--measure);
  margin: calc(var(--leading) - 1cap) 0 0; text-box: trim-both cap alphabetic; }
.page-spot { margin: 0; }
.page-spot.cmyk { overflow: visible; }
.page-spot .print { aspect-ratio: 4 / 3; }
@media (max-width: 720px) { .page-head { grid-template-columns: 1fr; } .page-spot { display: none; } }
.steps { list-style: none; margin: calc(1.5 * var(--leading)) 0 0; padding: 0;
  display: grid; gap: calc(1.5 * var(--leading)); max-width: 72ch; }
.step { display: grid; grid-template-columns: 56px 1fr; gap: 0 clamp(16px, 2vw, 28px); }
.step-num { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 42px; line-height: 1; color: var(--color-accent-700);
  font-feature-settings: "pnum" 1; }
.step h2 { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 24px; line-height: var(--leading); letter-spacing: -0.01em; margin: 0;
  text-box: trim-both cap alphabetic; }
.step p { font-size: 15.5px; line-height: var(--leading); margin: calc(var(--leading) - 1cap) 0 0;
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
  hyphens: auto; text-box: trim-both cap alphabetic; }
.step > div { grid-column: 2; }
.step .step-num { grid-column: 1; grid-row: 1; }
.tablewrap { margin: calc(1.5 * var(--leading)) 0 0; max-width: 860px; overflow-x: auto; }
code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em; background: var(--color-neutral-100);
  padding: 1px 5px; border-radius: var(--radius-sm, 2px); }
.codeblock pre code, pre code { background: none; padding: 0; }
.bullets { margin: calc(1.5 * var(--leading)) 0 0; padding: 0; list-style: none;
  display: grid; gap: var(--half); max-width: 72ch; }
.bullets li { font-size: 15.5px; line-height: var(--leading);
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
  padding-left: 18px; position: relative; }
.bullets li::before { content: "—"; position: absolute; left: 0;
  color: var(--color-accent-700); }
.bullets li strong { color: var(--color-text); font-weight: 600; }
.crosslinks { display: flex; gap: var(--space-3); flex-wrap: wrap;
  padding: calc(2 * var(--leading)) 0 0; }
.prose { max-width: var(--measure); }
.prose h2 { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 24px; line-height: var(--leading); margin: calc(2 * var(--leading)) 0 0;
  text-box: trim-both cap alphabetic; }
.prose p { font-size: 15.5px; line-height: var(--leading);
  margin: calc(var(--leading) - 1cap) 0 0;
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
  text-box: trim-both cap alphabetic; }


/* Follow-the-author chip — same contract as pigeon.c52.com */
.nav .follow-author {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  flex: 0 0 auto;
  padding: 0.3em 0.85em 0.3em 0.3em;
  background: var(--color-surface, #eae9e9);
  border: 1px solid color-mix(in srgb, var(--color-text) 16%, transparent);
  border-radius: 999px;
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.78em;
  font-weight: 400;
  line-height: 1.2;
  white-space: nowrap;
}
.nav .follow-author img {
  width: 2.35em;
  height: 2.35em;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  flex: 0 0 auto;
  mix-blend-mode: normal;
}
.nav .follow-author span { white-space: nowrap; }
.nav .follow-author:hover {
  color: var(--color-accent-2, #d6006c);
  border-color: var(--color-accent-2, #d6006c);
  text-decoration: none;
}
@media (max-width: 640px) {
  .nav a:not(.follow-author):not(.nav-brand a) { display: none; }
  .nav .follow-author span { display: none; }
  .nav .follow-author { padding: 0.28em; }
}